Really great piece mate, loved the concept and ideia, the grim's face and wings are really well done and cool, the scythe as well.
I have two issues with it though:
I think the shadows could be more dark, to give a better sense of deph
And i think the soldiers faces look cartoony, which takes the viewer out of the dark themes this piece has.
But overall, its a great piece. Keep doing the great job mate!